Pump



Aug. 17, 1943.

H. DE- w. THOMASON 2,326,902

PUMP

Filed NOV. 26, 1941 2 Sheets-Sheet l I516 %JIZ?Z' aaa 27/ 1.,-

I The i s n .'ifive ibhi hi fi i l u "ful improvementsinpumps, particularly for oil wells, "although it vvillbe understood, of} course,

' 'i that the; devicen ay be used forlanyotherjpurrne. pri -meta; the ihverltiee isto pr id n; m n' ri e na t r. s, t;-. rth pump ,of the ch'araoter describe df comprising; a a

sl'eev novel construction, combination and arrangement valves forcontrollingfthefiuid;

. ,EOther objects pt. the f nve tionare} provide apumper-tne oharacter-setiiorth comparatively siinple in geenstmeue strong, durable, highly I efiicient and reliable in use, coinpact -;and which;may be n anuIactured' at low ich w'ill be Cost. I V w r V All of the foregoing and still-further objects parent from'a study of the following specificatiomj designate corresponding parts throughout the" several views, and wherein: I v 1 1 V Figure 1 is a view in vertical section through "a barrel and a portion of a welltubing, showing; l-

a pump. constructed in accordance with the present invention therein." f

Figure 2 isa vertical sectional View; through 307 V Figure 3 is a vertical sectional .view through the lower portion of the pump; v

the upper portion of theepumpi Figure 4 is a view in horizontal section, taken substantially on the line 4+4 ofeFigure 2. Figure 5 is a view in-horizontalsection, taken substantially on the line S -BfofiFigure 2. a Figure :6 is a view in horizontal section, taken substantially on the line 6 6 ofeFig ure 3.

Figure '7 is adetail view inperspectiveof 'the' lower valve. a

Referring now to '1 the drawings in detail, it

7 i will be seen thatreference'numeral l designates a suitable pumpb'arrel'; A conventionalstand-' ing valve 2 is provided in the lower end portion tubing 3. we

The embodiment of the resent avenues which has been'illustrated'comprises afpistonf which is designated generally by the reference a De Witt .1 Applica tsi evemtei zs;194 ;se aif N i 29564;; I- 4; Claims (01. 103-1 225) and'advantages of the invention will become ap- '0 7 taken in connection with the "accompanying:

drawings wherein like characters of reference 7 of'the barrel If, 'Rising fromfth'e' barrel l is tubing 3. Aypuinp rod 4 is operable in' the well numeral 5, said piston being operable in the f barrel I The piston .5 includes elongated upper and lower cylinders 6 and L'respectively. The

- .hicn fs hre d dlinto'itheadia' efjis'aldjcylinders-fli i Th ade i t I h eadedly connected-to the e va 321's siid'abiefo' h tube [24 I'I'hreaded into the upper "portion e: g the valve 13 is'a'plug I8.' "Dependi r'1girom the iugila is y a valve 19' whichis' adapted to seat in the upper end portion offt-hetube I ZIor closing said tube. Threaded into thelgwer end; portionot the lowercylinder I is a tubularmember 20fhavinga plurality of circumferential-fluid sealgrooves 2i therein. A packing 22 is provided'on the lower end portion of the' rnemberior .The member zfl terminates in an externally reduced. upper/send; .7

' portion'23 thusj providing ahoriz'ontal shoulders-.1,

V The bore 25 of themeinber zll communicates a, with the chamber 26 in the" cylinder 1. Operable" finlthe chamber 26 isflan inverted substantially cup-shaped valve zljwhich isengageable with the a seat 24: over the Ir'ed uotion' 23, for closing' the chamberzfi against backflow of.the. fluid.' The eva1ve 21 is polygonal in horizontal section, thus a providing passages 28 for the upw'ardflow ofthe diuid. (A bar 29 in the cylinder 1 positively limits the upward movement of the valve 21.1 It is thought that the operationjof the p'unip will be readily apparent-from a consideration of the foregoing; l Briefly; on the up stroke of the piston 5,;.the fluid is-drawn past the' standing" I :valve 2' intothe lower portion of the barrel I.

On the downJstrokeiof the piston 5, this-fluid which,'offcourse', is trapped by the standing valve 1 2 in theiba'rrel I; is forced upwardly through the; V a

bore 25 of the member 2a, lifting the valve2l from thej eat'fl' and flowing around said valve throughathe passages 28' intothe chamber 26 of the cylinder]. 7 On successive down strokes ofthe piston, the fluid trapped in the chamberizd by' a V the valve 21 is forced'upwardly through the bore cylinders 6 and are joined by a connection 8 30 of the tube ll and entersthe upper portion I sp e 1 5 "is a tube 12.7

a .7 a the rneuppe portienfef the valvej l's Pr d d: h s' ha s P r t re i t j e. I w 11 ports 15in e :uppetpo tien 1 theflcylind'er;

f'oiicha'nnel"l'fiiwmcham riposi I of the valve l3. Thus, thevalve I3 is raised in a manner to bring the ports Hand I5 into registry o forithe escapeof the fluid from the piston 5 into 7 the tubing3. Fluid from the tubing 3 enters the tube I2.

It is believed that'the many advantages of a. "pump constructed in accordance with the pres- U ent invention will be readily understood, and- 1 although a preferred embodiment of the device is as illustratedand described; it is to be understood that changes in the details of'construction 4 I p x l 2,326,902:

:first-named ports, and means ior' closing the upperend-of the sleeve, said means including a plug threadedly mounted in the upper end portion of the sleeve, and a valve depending from said plug and engageable inthe tube;

3. A pump of the character described cornprising a piston including communicating upper an lowercylinders, an internal joint connecting said cylinders, a tube rising from said jointin spaced concentric relation tqithe' upper "cylinder, said supper cylinder'havingdischargeports therein, a

and in the combi n and r entor parts V t -"enuo r 'saidtubeif may be resorted to which will 'fall fvvithin the scope of theinvention as claimed. 1 T

What is claimed'is: I I. p IiA'pum d f'tliecharactrdesc' ib'e' 'coznpri'sing a piston including upper anci loiiier cylinders,

a joixitfcoiine'ctiiig said yliiiderjs, "a tubefrising frornthejoint m tneiumiergcyiinde'r anq space therfrlo'rmTalsleeve slidfalile on said tube, th'iillper'cylin'derfhaving"discharge.portsiherein; said sleeve slidable on; the tube -and,having ports. tlierein forregistry with the first-named ports, a member on theiupper end of the upper cylinder having fluid'intake ports therein, and a valve on -tli'e 'upper ndiofthesleeve closing said upper end ,and engageable in the-tube for 'valving the upper 4.:A p1imp comprising: connected upper and lower cylinders the upper cylinder having discharge portsf therein, a'tube in'the uppercylinder spaced concentricallyftherefromf a. elevated sleeve slidabie onrsald tube, and ;having ports therein ior registry with; the "first rramd .lpoifts, means fo-rse'cu'ring the'sleeve against-rotatiori on sieeve'navm port s there'nf'iorfregistry withjtn'e 1 amedlpOrtsLa'nd means '{or'closingfthe llD- 2 v tube; perend of the; sleeve.

inga piston upper. and lowrlcylindei's V a a er d wand rs be sn' frem the joint in the upper -cyl-inder and spaced therefrom, asleeve sliiiable n aiatub iiriedin- -ili m i s d whairger-ts-tee e e s i sleeve havingports therein rfor i registr with the 1" for enfgagenient'rwithfthe" plug 1' qrifforfclrigfthe sleeve a valvefon'is'aid plug: engageabledn the a Q 'ih ne re fi 1m Hate ing n- Ward o e -0H e sle v 'fl s. in I registry, said" cap providing ,7 hainb'er j and having .pa'sjs'agestherein'for thel ntalge of [fluid sleeve 1 downwardly P s ar 7 

